iswctype(3) Library Functions Manual iswctype(3) iswctype - C (libc, -lc) #include int iswctype(wint_t wc, wctype_t desc); If wc is a wide character having the character property designated by desc (or in other words: belongs to the character class designated by desc), then the iswctype() function returns nonzero. Otherwise, it returns zero. If wc is WEOF, zero is returned. desc , wctype(3). iswctype() , wc . 0. attributes(7). +----------------------------+----------------------------------------------------------+--------------------------+ | | | | +----------------------------+----------------------------------------------------------+--------------------------+ |iswctype() | | MT-Safe | +----------------------------+----------------------------------------------------------+--------------------------+ C11, POSIX.1-2008. POSIX.1-2001, C99. iswctype() LC_CTYPE . iswalnum(3), iswalpha(3), iswblank(3), iswcntrl(3), iswdigit(3), iswgraph(3), iswlower(3), iswprint(3), iswpunct(3), iswspace(3), iswupper(3), iswxdigit(3), wctype(3) () Azamat Hackimov , Dmitriy S. Seregin , Yuri Kozlov , Kirill Rekhov ; GNU (GNU General Public License - GPL, 3 ) , - . - , , () () () <>. Linux 6.9.1 2 2024 . iswctype(3)